A comparison of the tissue oxygenation achieved using different oxygen delivery devices and flow rates (Retracted article. See vol. 46, pg. 55, 2016)

作者：Blake Denise F^*; Naidoo Philip; Brown Lawrence H; Young Derelle; Lippmann John

来源：Diving and Hyperbaric Medicine, 2015, 45(2): 79-83.

• Scuba diving
• decompression illness
• first aid
• oxygen
• equipment
• transcutaneous oximetry
• medical kits
• DAN (Divers Alert Network)

Introduction: High-concentration normobaric oxygen (O-2) administration is the first-aid priority in treating divers with suspected decompression illness. The best O-2 delivery device and flow rate are yet to be determined.
Aim: To determine whether administering O-2 with a non-rebreather mask (NRB) at a flow rate of 10 or 15 L.min(-1) or with a demand valve with oronasal mask significantly affects the tissue partial pressure of O-2 (PtcO2) in healthy volunteer scuba divers.
Methods: Fifteen certified scuba divers had PtcO2 measured at six positions on the arm and leg. Measurements were taken with subjects lying supine whilst breathing O-2 from a NRB at 10 or 15 L.min(-1), a demand valve with an adult Tru-Fit oronasal mask and, as a reference standard, an oxygen 'head hood'. End-tidal carbon dioxide was also measured.
Results: While none of the emergency delivery devices performed as well as the head hood, limb tissue oxygenation was greatest when O-2 was delivered via the NRB at 15 L.min(-1). There were no clinically significant differences in end-tidal carbon dioxide regardless of the delivery device or flow rate.
Conclusion: Based on transcutaneous oximetry values, of the commonly available emergency O-2 delivery devices, the NRB at 15 L.min(-1) is the device and flow rate that deliver the most O-2 to body tissues and, therefore, should be considered as a first-line pre-hospital treatment in divers with suspected decompression illness.

• 出版日期2015-6